THE AUTHORS 



GLENN H. DEITSCHMAN, a native of Minnesota, earned his 

 B.S. degree in forestry at the University of Minnesota, 

 and his master's degree at Penn State, His Forest 

 Service career began at the Central States Station's 

 branch at Carbondale, Illinois, in 1948, where he was 

 a Research Forester in silviculture and regeneration. 

 From 1955 to 1961 he was Research Center Leader at 

 Ames, Iowa. Since 1961 he has been Principal Silvi- 

 culturist working on research in the silviculture of 

 western white pine at Moscow, Idaho. 



ROBERT D. PFISTER, Plant Ecologist and Leader of the 

 Forest Ecosj^stems research work unit at Missoula, 

 Montana, joined the Intermountain Station staff in 1961. 

 He holds the B.S. and M.S. degrees in forest manage- 

 ment from Iowa State University and Oregon State Uni- 

 versity, respectively, and recently received a Ph.D. 

 degree in botany from Washington State Universit}^ 

 During part of this study the author was stationed at 

 the Forestry Sciences Laboratory in Moscow, Idaho. 



growth of a western white pine tree in a cleccred 

 t; on hack cover, same tree is shown 14 years 

 37 years after treatment (right). 



